基于灰色关联改进TOPSIS法的热水系统最优太阳能保证率

AN IMPROVED TOPSIS BASED ON GRA APPLIED TO OPTIMAL SOLAR FRACRION FOR SWHS

为了更全面、科学地选择太阳能保证率,综合考虑经济、能效、环保、安全与维护等因素,建立多层次结构评价模型。利用基于灰色关联分析的TOPSIS排序法,以相对贴近度最小为评价标准,对不同辅助热源形式的太阳能保证率进行方案选优。结果表明,当前的经济资源条件下,不同辅助热源形式对应的最优保证率存在差异。宜选用单价与热值比相对较小的辅助热源,使最优保证率处于适中范围。该模型为实际工程的设计与评价提供了新的方法和途径。

In order to select solar fraction more comprehensively and scientifically, a multi-level evaluation model based on the consideration of economy, energy efficiency, environmental protection, system safety and maintenance was established. The TOPSIS ranking method based on gray relation analysis was applied, and the model could be used to select the optimal solar fraction under different forms of auxiliary heat source, with minimum relative similarity degree as the evaluation criteria.The results show that, in the current economic and resource condition, the optimal solar fractions corresponding to different forms of auxiliary heat source are different. Auxiliary heat source, with smaller ratio of unitprice to calorific value, should be preferentially chosen for making the optimal solar fraction in a moderate range. The model is used to provide a new method and approach for the design and evaluation for practical engineering.